IBM Plex Sans with Quase Headline in action on ossovr.com

Under the hood

.header-1 { font-family: Quaseheadline, sans-serif; font-size: 60px; font-style: normal; font-weight: 500; letter-spacing: normal; line-height: 66px; text-transform: none; color: #333333; }
.content-1 { font-family: "IBM Plex Sans", sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: normal; line-height: 28px; text-transform: none; color: #333333; }
.content-2 { font-family: "IBM Plex Sans", sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: normal; line-height: 25px; text-transform: none; color: #FFFFFF; }